KR101849745B1

KR101849745B1 - Gas vent of core insert type

Info

Publication number: KR101849745B1
Application number: KR1020160029092A
Authority: KR
Inventors: 이종근
Original assignee: (주)백암이노베이션
Priority date: 2016-03-10
Filing date: 2016-03-10
Publication date: 2018-04-20
Also published as: KR20170105875A

Abstract

The core inserting gas vent 90 according to the present invention includes a housing 100 opened up and down and a core 200 inserted into the housing 100. The housing 100 and the core 100 200 formed on the outer circumferential surface.
Therefore, since the core 200 and the housing 100 are formed of only two pieces, the steel plate can be cut by a wire cutter. Therefore, since it is not necessary to cut a plurality of plates by milling as in the background art, it is easy to produce and can be processed quickly. Therefore, productivity can be improved.
Further, it can be formed into a cylindrical shape so that it can be applied to the insertion hole (V) of the injection mold (M) formed in a circular shape. Therefore, the insertion hole V can be easily machined by a drilling operation.
In addition, since the core 200 is formed in a combined state in the housing 100, there is an effect that the phenomenon of loss is not generated during storage.

Description

[0001] The present invention relates to a core insertion type gas vent,

The present invention relates to a core inserting gas vent, and more particularly, to a core inserting gas vent which is configured to exhaust gas between the housing and a core by inserting the core into the housing.

Hereinafter, the structure and operation of the laminated gas vant 1 according to the background art will be described with reference to the accompanying drawings.

Fig. 1 is a perspective view showing a stacked gas vent according to the background art, and Fig. 2 is a perspective view showing an example in which a stacked gas vent according to the background technique is mounted on a lower mold of an injection mold.

In general, in the case of an injection mold, the molten synthetic resin is injected into the injection mold, and then the upper mold and the lower mold S constituting the injection mold are separated from each other.

The upper mold and the lower mold S are formed with a molding groove U in which synthetic resin is filled on mutually facing surfaces. However, if the molten synthetic resin is injected into the injection mold, gas is generated and bubbles are formed, so that a dense tissue product can not be formed. Therefore, there is a need to exhaust gas from the injection mold S.

For this purpose, the stacked gas vent 1 shown in Fig. 1 is used.

A plurality of plates 10 are closely adhered to the laminated gas vans 1 and the plate 10 is disposed at a lower portion of the lower plate 11 and at a lower position than the lower plate 11 T) is small. A connection plate 13 having a width (V) and a thickness (T) smaller than that of the bottom plate 11 and the top plate 15 is connected between the bottom plate 11 and the top plate 15 at both sides. An exhaust groove 12 is formed on one side of the lower plate 11 so as to be opened upward and downward.

When the plate 10 is closely contacted, both sides of the bottom plate 11 are in close contact with each other, and a gap G is formed between the top plates 15.

2, when the stacked gas vent 1 is mounted on the lower mold S of the injection mold, the gas contained in the molten synthetic resin can be exhausted through the gap G and the exhaust groove 12 .

According to the background art, there are the following problems.

Firstly, since it is constituted by being divided into a plurality of plates 10, it is difficult to process and it takes a lot of time, resulting in an increase in manufacturing cost. That is, in order to form the bottom plate 11, the top plate 15, and the connecting plate 13 having different dimensions in the plate 10, it is necessary to cut the metal material in a plane. Therefore, the metal material is subjected to a process of milling and polishing with a grinder to adjust the tolerance. However, if a plurality of plates 10 are manufactured through these processes, it is difficult to perform a rapid operation, resulting in a problem of deteriorating productivity.

Secondly, if the insert hole H formed for inserting the stacked gas vent 1 into the lower mold S of the injection mold is circular, it is easy to process. That is, it can be easily formed through drilling. However, in the case of a quadrilateral as in the background art, a long molding process must be performed from the mill to the end mill. That is, since the laminated gas vans 1 have to be formed only in a square shape, the insertion holes H are difficult to be machined.

Thirdly, when the gas is exhausted through the gap G, the tar included in the gas occludes the gap G. FIG. At this time, the plate 10 needs to be pulled out from the injection mold, which lacks a pull-out function, which makes it difficult to separate the plate 10 from the injection mold. In addition, even if the plate 10 is removed, it is troublesome to remove the tar by washing each plate 10 with a thinner.

Fourth, since the plurality of plates 10 are separated from each other, the stacked gas vans 1 are liable to be lost during storage.

Korean Patent Registration No. 10-1221408 (Registered on January 07, 2013)

The core inserting gas vans according to the present invention are intended to solve the following problems.

First, since it is constituted by dividing into a plurality of plates, it is difficult to process and it takes a long time to solve the problem of increase in manufacturing cost.

Secondly, since the stacked gas vant according to the background art has a hexahedral shape, the insertion hole formed in the injection mold has to be formed in a square shape. Accordingly, it is intended to solve the problem that the insertion hole is difficult to be machined.

Third, it is difficult to solve the problem that it is difficult to take out the stacked gas vent in the state of being inserted into the injection mold.

Fourth, since the laminated gas vents are formed by closely adhering a plurality of plates, when the gaps are closed, the plurality of plates are wiped with a thinner to remove the tar.

Fifth, since a plurality of plates are combined with each other, some problems are liable to be lost when stored.

The core inserting gas can according to the present invention is constructed as follows.

And a gap inserted between the housing and the core, wherein the gap between the housing and the core is larger than the gap between the housing and the core.

The housing includes a circular outer tube opened in upper and lower chambers, a support block accommodated in the outer tube and having a tapped hole opened upward, and a rib connecting the support block and the outer tube,

The core includes a male screw portion that is fastened to the tapped hole and a cylindrical head that is connected to an upper portion of the male screw portion and is received in the outer tube, and the gap is formed between the head and the outer tube.

Another example of the present invention may be configured as follows.

And a plurality of protrusions protruding from an upper end of the housing to be in close contact with the core, the housing including a plurality of projections do.

The housing includes a circular outer tube opened in upper and lower chambers, a support block accommodated in the outer tube and having a tapped hole opened upward, ribs connecting the support block and the outer tube, And the protrusion formed on the top,

The core includes a male screw portion which is fastened to the tapped hole and a cylindrical head which is connected to an upper portion of the male screw portion and closely attached to the upper end of the male screw portion. The outer diameter of the head is smaller than the outer diameter of the outer tube .

The core inserting gas vent of the present invention has the following effects.

First, the number of parts is smaller than that of the background technology because it is composed of only two pieces of core and housing. Therefore, there is no inconvenience of machining a plurality of plates as in the background art, so that production is easy and rapid machining is possible, and productivity can be improved.

Second, it can be formed into a cylindrical shape so that it can be applied to an insertion hole of an injection mold formed in a circular shape. Therefore, the insertion hole can be easily machined by a drilling operation.

Third, since the core is assembled to the housing by a screw fastening method, the core can be easily attached and detached. Therefore, when the gap between the core and the housing is clogged with tar, the core can be easily separated and the tar can be removed. Particularly, since the core and the housing are composed of only two parts, there is an advantage that there is no inconvenience that a plurality of plates need to be wiped individually as in the background art in order to remove tar.

Fourth, since the housing is formed in a state in which the cores are combined, there is an effect that the phenomenon of loss is not caused during storage.

1 is a perspective view showing a stacked gas vent according to the background art;
2 is a perspective view showing an example in which a stacked gas vent according to the background art is mounted on a lower mold of an injection mold;
3 is a perspective view showing a first embodiment of a core insertion type gas vent according to the present invention.
4 is an exploded perspective view showing a first embodiment of a core insertion type gas vent according to the present invention.
FIG. 5 is a perspective view of a core inserting gas vant according to a first embodiment of the present invention as an incision in which a part of a housing is cut. FIG.
FIG. 6 is a perspective view of a core insertion type gas vent according to a first embodiment of the present invention, in which the ribs formed in the housing extend to the lower end. FIG.
7 is a perspective view showing a second embodiment of a core insertion type gas vent according to the present invention.
8 is an exploded perspective view showing a second embodiment of a core insertion type gas vent according to the present invention.
FIG. 9 is a perspective view of a core inserting gas vent according to a second embodiment of the present invention as an incision showing a part of a housing as an incision. FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

(Embodiment 1)

FIG. 3 is a perspective view showing a first embodiment of a core insertion type gas vent according to the present invention, FIG. 4 is an exploded perspective view showing a first embodiment of a core insertion type gas vent according to the present invention, FIG. 6 is a perspective view of a core inserting gas vent according to the present invention, in which a rib is formed in a housing and extends to a lower end portion 1 is a cross-sectional perspective view of a gas inserting type gas vent 90 according to a first embodiment of the present invention.

And a gap G formed between the housing 100 and the core 200 is formed in the housing 100. The core 100 is inserted into the housing 100, .

Hereinafter, the configuration will be described in detail.

The housing 100 includes a circular outer tube 110 that is opened upward and downward and a support block 120 accommodated in the outer tube 110 to support and support the core 200, do. A taper hole 140 is formed to open the upper part of the support block 120 and extends upward so as to hold the center of the core 200. The core 200 is formed at a lower portion of the taper hole 140, And a tapped hole 125 to which the tapped hole 125 is coupled. A plurality of ribs 130 connecting the support block 120 and the outer tube 110 are arranged along the periphery of the support block 120. Therefore, the outer tube 110 is configured to communicate with the upper and lower chambers through the ribs 130.

The rib 130 may extend to the lower end as shown in FIG.

The core 200 is formed with a male thread 210 to be fastened to the tapped hole 125 and a tapered shaft 210 extending upward toward the tapered hole 140, (230) are connected to each other. A cylindrical head 220 connected to an upper portion of the taper shaft 230 and having a width greater than that of the taper shaft 230 is accommodated in the outer tube 110. A tool groove 225 is formed on the upper surface of the head 220 so as to be easily rotated by a tool such as a screwdriver. For example, a cross groove may be formed for rotation by a screw driver, A dent groove may be formed to allow rotation.

In addition, since the gap G is formed between the head 220 and the outer tube 110, gas can be exhausted. The gap G is, for example, 0.05 mm to 0.07 mm.

The use of the first embodiment with reference to FIGS. 3 to 6 will now be described.

The taper shaft 230 is inserted into the taper hole 140 and the center of the core 200 is inserted into the taper hole 140. [ The centers of the tapped holes 125 coincide with each other. Accordingly, the gap G may be constant along the circumference of the head 220. [ If the taper hole 140 and the taper shaft 230 are not present, the head 220 is biased to one side due to the clearance between the taper hole 125 and the male screw portion 210, The gap G between the electrodes can not be formed. That is, since a part of the head 220 is close to one side of the outer tube 110, the gap G between the remaining part of the head 220 that is not adjacent to the outer tube 110 becomes 0.07 mm or more, A phenomenon exceeding 0.05 mm to 0.07 mm, which is a range of the gap G, occurs, and this phenomenon causes a defect of the gap G by forming the gap G in the injection-molded article. However, the present invention can prevent such a phenomenon by the combination of the taper hole 140 and the taper shaft 230.

Thus, in a state where the core 200 is mounted on the housing 100, the housing 100 is mounted on the injection mold. When the melted synthetic resin is injected into the injection mold, gas contained in the synthetic resin is exhausted between the support block 120 and the outer tube 110 through the gap G, so that pores are formed in the injection mold .

When the gap G is closed by the tar contained in the gas, the tool 200 may be detached from the tool groove 225 by rotating the tool in the direction of unwinding. After removing the tar from the periphery of the head 220 constituting the core 200 and the inner surface of the housing 100 inserted into the injection mold and then using the tool again to insert the core 200 into the housing 100 The tar removal operation is completed.

(Second Embodiment)

FIG. 7 is a perspective view showing a second embodiment of a core insertion type gas vent according to the present invention, FIG. 8 is an exploded perspective view showing a second embodiment of the core insertion type gas vent according to the present invention, The construction and use of the core inserting gas vent 90 according to the present invention will be described as an exploded perspective view showing a part of the housing as a second embodiment of the core inserting gas vent according to the present invention.

The housing 100 is opened to the upper and lower sides of the housing 100 and a portion of the housing 100 is inserted. The remaining portion of the core 200 is in close contact with the upper end of the housing 100. A plurality of protrusions 113 protruding from the upper end of the housing 100 and closely contacting the core 200 are formed.

Hereinafter, the configuration will be described in detail.

The housing 100 includes a circular outer tube 110 that is opened upward and downward and a support block 120 accommodated in the outer tube 110 to support and support the core 200, do. A taper hole 140 is formed to open the upper part of the support block 120 and extends upward so as to hold the center of the core 200. The core 200 is formed at a lower portion of the taper hole 140, And a tapped hole 125 to which the tapped hole 125 is coupled. A plurality of ribs 130 connecting the support block 120 and the outer tube 110 are arranged along the periphery of the support block 120. Therefore, the outer tube 110 is configured to communicate with the upper and lower chambers through the ribs 130. A plurality of protrusions 113 are formed at the upper end of the outer tube 110 to support the core 200.

The core 200 is formed with a male thread 210 to be fastened to the tapped hole 125 and a tapered shaft 210 extending upward toward the tapered hole 140, (230) are connected to each other. The head 220 is connected to an upper portion of the taper shaft 230 and has a width greater than that of the taper shaft 230 and is in close contact with an upper end of the protrusion 113.

The outer diameter D2 of the head 220 is smaller than the outer diameter D1 of the outer tube 110 so that the gas can be exhausted. The outer diameter of the head 220 is, for example, 0.05 mm to 0.07 mm . 9, when the housing 100 is inserted into the injection mold M, a gap G is formed between the insertion groove V formed in the injection mold M and the head 220, Which is a difference between the outer diameters of 0.05 mm and 0.07 mm.

A tool groove 225 is formed on the upper surface of the head 220 so as to be easily rotated by a tool such as a screwdriver. For example, a cross groove may be formed for rotation by a screw driver, A dent groove may be formed to allow rotation.

The use of the present invention will be described with reference to FIGS. 7 to 9 as follows.

The taper shaft 230 is inserted into the taper hole 140 and the center of the core 200 is inserted into the taper hole 140. [ The centers of the tapped holes 125 coincide with each other. Accordingly, the gap G may be constant along the circumference of the head 220. [ If the taper hole 140 and the taper shaft 230 are not present, the head 220 is biased to one side due to the clearance between the taper hole 125 and the male screw portion 210, The gap G between the electrodes can not be formed. A gap G between the remaining portion of the head 220 and the insertion groove V that is not adjacent to the head 220 is set to a predetermined value, Is 0.07 mm or more, a phenomenon exceeding 0.05 mm to 0.07 mm, which is the range of the gap (G), occurs. This phenomenon forms a gap of the gap G in the injection-molded article and causes defects. However, the present invention can prevent such a phenomenon by the combination of the taper hole 140 and the taper shaft 230.

The gap G is formed between the insertion groove V and the head 220 when the housing 100 having the core 200 is inserted into the insertion groove V formed in the injection mold M .

In this state, when the upper mold and the lower mold of the injection mold M are coupled and the molten synthetic resin is injected into the injection mold M, the gas contained in the synthetic resin passes through the gap G, 113, and is exhausted downward through the space between the support block 120 and the outer tube 110.

When the gap G is closed by the tar contained in the gas, the tool 200 may be detached from the tool groove 225 by rotating the tool in the direction of unwinding. Then, the tar is removed from the periphery of the head 220 and the inner surface of the insertion groove (V), and then the core 200 is fixed to the housing 100 by using a tool.

According to the present invention, since the core 200 and the housing 100 are composed of only two pieces, the number of parts is smaller than that of the background art. As a result, there is no inconvenience of cutting a large number of plates as in the background art. Therefore, it is possible to produce easily and quickly, and productivity can be improved.

Further, it can be formed into a cylindrical shape so that it can be applied to the insertion hole (V) of the injection mold (M) formed in a circular shape. Therefore, the insertion hole V can be easily processed by a drilling operation.

Further, since the core 200 is assembled to the housing 100 by a screw fastening method, the core 200 can be easily attached and detached. Therefore, when the gap G between the core 200 and the housing 100 is blocked by tar, the core 200 can be easily separated and the tar can be removed. Particularly, since the core 200 and the housing 100 are composed of only two parts, there is an effect that there is no inconvenience that a plurality of plates need to be individually wiped to remove tar as in the background art.

In addition, since the core 100 is formed in a combined state in the housing 100, there is an effect that no phenomenon of loss occurs during storage.

The embodiments and the accompanying drawings described in the present specification are merely illustrative of some of the technical ideas included in the present invention. Therefore, it is to be understood that the embodiments disclosed herein are not for purposes of limiting the technical idea of the present invention, but are intended to be illustrative, and thus the scope of the technical idea of the present invention is not limited by these embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

90: core inserting gas vent 100: housing
110: outer tube 113:
120: support block 125:
130: rib 200: core
210: male thread 220: head
225: Tool groove

Claims

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A housing 100 opened up and down,
And a core (200) which is partially inserted into the housing (100) and is not inserted, the remaining portion being in close contact with an upper end of the housing (100)
And a plurality of protrusions (113) protruding from an upper end of the housing (100) and closely contacting the core (200)
The housing (100)
A circular outer tube 110 opened to upper and lower chambers,
A support block 120 accommodated in the outer tube 110 and having a tapped hole 125 opened upward,
A rib 130 connecting the support block 120 and the outer tube 110,
And the protrusion 113 formed on the upper end of the outer tube 110,
The core (200)
A male screw portion 210 fastened to the tapped hole 125,
And a cylindrical head 220 connected to an upper portion of the male screw portion 210 and closely attached to an upper end of the protrusion 113,
The outer diameter D2 of the head 220 is smaller than the outer diameter D1 of the outer tube 110 ,
And a tool groove (225) formed on an upper surface of the head (220) and formed to be rotatable by inserting a tool,
A taper hole 140 connected to an upper portion of the tapped hole 125 and opened upwardly of the support block 120 and extending upward,
And a taper shaft (230) closely attached to the taper hole (140) and connected to an upper portion of the tapped hole (125) and connected to the head (220) .

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